:root {
  --canvas: #f3f3f2;
  --surface: #ffffff;
  --surface-sunk: #f0f0ef;
  --text: #1a1a1a;
  --on-text: #ffffff;
  --text-soft: #5c5c5c;
  --text-faint: #8a8a8a;
  --border: #e4e4e2;
  --border-strong: #c6c6c3;
  --danger: #b3261e;

  --r-sm: 6px;
  --r-md: 10px;
  --r-pill: 100px;

  --control-h: 38px;
  --measure: 68ch;

  --shadow-pop: 0 16px 48px -12px rgba(0, 0, 0, 0.28);
  --shadow-raise: 0 1px 2px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --canvas: #121212;
    --surface: #1e1e1e;
    --surface-sunk: #272727;
    --text: #ededed;
    --on-text: #161616;
    --text-soft: #a4a4a4;
    --text-faint: #767676;
    --border: #323232;
    --border-strong: #494949;
    --danger: #f2b8b5;

    --shadow-pop: 0 16px 48px -12px rgba(0, 0, 0, 0.6);
    --shadow-raise: 0 1px 2px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--canvas);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, p, ul { margin: 0; }
button { font-family: inherit; }

:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: var(--control-h);
  padding: 0 15px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.12s ease, border-color 0.12s ease, color 0.12s ease;
}

.btn-primary {
  background: var(--text);
  color: var(--on-text);
  border-color: var(--text);
}
.btn-primary:hover { opacity: 0.9; }
.btn-primary:active { opacity: 0.8; }

.btn-ghost {
  background: transparent;
  color: var(--text-soft);
  border-color: var(--border-strong);
}
.btn-ghost:hover {
  color: var(--text);
  background: var(--surface-sunk);
}

.btn-block { width: 100%; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--control-h);
  height: var(--control-h);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  color: var(--text-faint);
  font-size: 14px;
  cursor: pointer;
  transition: background-color 0.12s ease, color 0.12s ease;
}
.icon-btn:hover {
  background: var(--surface-sunk);
  color: var(--text);
}

/* ---------- form fields ---------- */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field > span {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-soft);
}
.field em {
  font-style: normal;
  font-weight: 400;
  color: var(--text-faint);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  font-family: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
.field input,
.field select {
  min-height: var(--control-h);
  padding: 0 11px;
}
.field textarea {
  padding: 9px 11px;
  line-height: 1.5;
  resize: vertical;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--text);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--text) 14%, transparent);
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 520px) {
  .field-grid { grid-template-columns: 1fr; }
}

/* ---------- app shell ---------- */
.app {
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(16px, 4vw, 40px) clamp(16px, 4vw, 32px) 104px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-bottom: 20px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.topbar-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.account-email {
  font-size: 12px;
  color: var(--text-faint);
}

.wordmark {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.tagline {
  margin-top: 3px;
  font-size: 13px;
  color: var(--text-soft);
}

/* ---------- ledger ---------- */
.ledger { min-height: 40vh; }

.ledger-bar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 16px;
}

.day-group + .day-group { margin-top: 28px; }

.entry-list { display: flex; flex-direction: column; }

#log-content[data-view="cards"] .entry-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 14px;
}
#log-content[data-view="cards"] .entry {
  margin: 0;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
}
#log-content[data-view="cards"] .entry:hover {
  background: var(--surface);
  border-color: var(--border-strong);
}
#log-content[data-view="cards"] .entry-did,
#log-content[data-view="cards"] .entry-meta,
#log-content[data-view="cards"] .entry-collab { max-width: none; }

.day-heading {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-bottom: 8px;
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-faint);
  border-bottom: 1px solid var(--border);
}
.day-heading .count { font-weight: 400; }

.entry {
  padding: 18px 10px;
  margin: 0 -10px;
  border-bottom: 1px solid var(--border);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: background-color 0.12s ease, border-color 0.12s ease;
}
.entry:last-child { border-bottom: none; }
.entry:hover { background: var(--surface-sunk); }
.entry:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

.entry-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.entry-task {
  flex: 1;
  min-width: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.35;
}

.entry-time {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
}

.badge {
  flex-shrink: 0;
  padding: 3px 9px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-soft);
  background: var(--surface-sunk);
  border-radius: var(--r-pill);
}

.entry-edit,
.entry-delete {
  flex-shrink: 0;
  padding: 2px 4px;
  font-size: 12px;
  color: var(--text-faint);
  background: none;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  opacity: 0.45;
  transition: opacity 0.12s ease, color 0.12s ease;
}
.entry:hover .entry-edit,
.entry:hover .entry-delete,
.entry-edit:focus-visible,
.entry-delete:focus-visible { opacity: 1; }
.entry-edit:hover { color: var(--text); opacity: 1; }
.entry-delete:hover { color: var(--danger); opacity: 1; }

.entry-did {
  margin-top: 10px;
  padding-left: 20px;
  max-width: var(--measure);
  font-size: 14px;
  line-height: 1.6;
}
.entry-did li { margin: 2px 0; }

.entry-meta {
  margin-top: 8px;
  max-width: var(--measure);
  font-size: 14px;
  line-height: 1.6;
}
.entry-meta strong {
  margin-right: 4px;
  font-weight: 600;
  color: var(--text-soft);
}

.entry-collab {
  margin-top: 12px;
  padding: 12px 14px;
  max-width: var(--measure);
  font-size: 13px;
  line-height: 1.55;
  background: var(--surface-sunk);
  border-radius: var(--r-md);
}
.entry-collab-title {
  margin-bottom: 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-soft);
}
.entry-collab p { margin-bottom: 2px; }

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.tech-chip {
  padding: 3px 10px;
  font-size: 11px;
  color: var(--text-soft);
  background: var(--surface-sunk);
  border-radius: var(--r-pill);
}

.empty {
  padding: 56px 0;
  text-align: center;
  font-size: 14px;
  color: var(--text-faint);
}

/* ---------- entry dialog ---------- */
.entry-dialog {
  width: min(560px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  padding: 0;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-pop);
  overflow: hidden;
}
.entry-dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
}
.entry-dialog[open] {
  animation: dialog-in 0.14s ease-out;
}
@keyframes dialog-in {
  from { opacity: 0; transform: translateY(6px) scale(0.985); }
}

#entry-form {
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 48px);
}

.dialog-head {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: space-between;
  padding: 14px 14px 14px 20px;
  border-bottom: 1px solid var(--border);
}
.dialog-head h2 {
  font-size: 15px;
  font-weight: 600;
}

.dialog-body {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px;
  overflow-y: auto;
}

.dialog-foot {
  display: flex;
  flex-shrink: 0;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
}

.more {
  border-top: 1px solid var(--border);
  padding-top: 4px;
}
.more > summary {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 0;
  list-style: none;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-soft);
  cursor: pointer;
}
.more > summary::-webkit-details-marker { display: none; }
.more > summary::before {
  content: "+";
  display: inline-block;
  width: 12px;
  font-size: 14px;
  text-align: center;
}
.more[open] > summary::before { content: "\2013"; }
.more-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 4px;
}

/* ---------- auth ---------- */
.auth {
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(24px, 10vh, 96px) 16px;
}

.auth-card {
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 28px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
}

.brand--center { text-align: center; }

.segmented {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--surface-sunk);
  border-radius: var(--r-sm);
}
.segmented--sm {
  display: inline-flex;
  padding: 3px;
}
.segmented-option {
  flex: 1;
  padding: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-soft);
  background: transparent;
  border: none;
  border-radius: calc(var(--r-sm) - 2px);
  cursor: pointer;
  transition: background-color 0.12s ease, color 0.12s ease;
}
.segmented--sm .segmented-option {
  flex: 0 0 auto;
  padding: 5px 14px;
  font-size: 12px;
}
.segmented-option[aria-selected="true"],
.segmented-option[aria-pressed="true"] {
  color: var(--text);
  background: var(--surface);
  box-shadow: var(--shadow-raise);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field-label-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.forgot-header {
  display: flex;
  align-items: center;
  min-height: var(--control-h);
}

.auth-messages {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.auth-error {
  font-size: 13px;
  color: var(--danger);
}
.auth-info {
  font-size: 13px;
  color: var(--text-soft);
}

.link-inline {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-soft);
  text-decoration: underline;
  cursor: pointer;
  align-self: flex-start;
}
.link-inline:hover { color: var(--text); }

/* ---------- buy me a coffee ---------- */
.bmc-button {
  position: fixed;
  right: clamp(16px, 4vw, 24px);
  bottom: clamp(16px, 4vw, 24px);
  z-index: 50;
  display: inline-block;
  border-radius: var(--r-md);
  box-shadow: 0 4px 16px -4px rgba(0, 0, 0, 0.3);
  transition: transform 0.12s ease;
}
.bmc-button img {
  display: block;
  height: 36px;
  width: auto;
  border-radius: var(--r-md);
}
.bmc-button:hover { transform: translateY(-2px); }
.bmc-button:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}